package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.bean.*;
import com.itheima.reggie.common.BeasContext;
import com.itheima.reggie.exception.CustomException;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * Created by IntelliJ IDEA.
 * User: 许志民
 * Date: 2021-11-28
 */
@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Override
    public void submit(Orders orders) {
//        A. 获得当前用户id, 查询当前用户的购物车数据
        Long userId = BeasContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);
//        B. 根据当前登录用户id, 查询用户数据
        User user = userService.getById(userId);
//        C. 根据地址ID, 查询地址数据
        LambdaQueryWrapper<AddressBook> addWarpper = new LambdaQueryWrapper<>();
        addWarpper.eq(AddressBook::getId,orders.getAddressBookId());
        AddressBook addressBook = addressBookService.getOne(addWarpper);
        if(addressBook == null){
            throw new CustomException("用户地址有误，请重新尝试");
        }
        long orderId = IdWorker.getId();//雪花算法生成一个订单id
        AtomicInteger amount = new AtomicInteger(0);
//        D. 组装订单明细数据, 批量保存订单明细
        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());
//        E. 组装订单数据, 批量保存订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
//        F. 删除当前用户的购物车列表数据
        shoppingCartService.remove(wrapper);
    }

    @Override
    public boolean updateStatus(Orders orders) {

        LambdaQueryWrapper<Orders> wapper = new LambdaQueryWrapper<>();
        wapper.eq(Orders::getId,orders.getId());
        Orders one = getOne(wapper);
        if(one == null){
            return false;
        }
        one.setStatus(orders.getStatus());
        boolean b = updateById(one);
        return b;
    }
}
